I have applied power in orignal circuit...Maybe your circuit doesn't work because it has no power supply.
Please show if its power supply has dual polarity and the voltage.
The LM324 works poorly above only 2kHz. It is very noisy. It has crossover distortion.
then will you please tell me that what IC i use for IA,The LM324 probably isn't that fantastic a choice to serve as an instrumentation amplifier. It's not surprising the circuit doesn't perform as you hoped.
Posting your circuit schematic would enable a better understanding of your setup & thereby assist forum members in making suggestions for improving your circuit.
OK - see the circuit now!
dear LM 124 and Lm 324 has same datasheet... so they can be called substitute of each other ... thats why I have used LM324 at the place of lm124.If you look at tis document on http://www.national.com/ds/LM/LM124.pdf at page 16 you will see a schematic just like yours. You can build an Instrumentation Amplifier with your Lm324. It will not be the best one. But good enough if you want to study the principals. If you have problem with your circuit I guess something not done correct.
By NOT giving all the details we have asked for you are only wasting your own time. If you had given us the details we have asked for. Your problem would have been solved now. But this is your call.
The LM124 is selected for better spec's. The LM124A is selected for the very best spec's. But it is not a good quad opamp because it is very old and it is made for low supply current.
An LM324 has very poor spec's.
Where can you buy resistors that are matched to 0.02% like the ones inside an AD620A instrumentation amplifier?
Where can you buy an LM324 that has its opamps matched as well as the opamps in an AD620A?
Why did you make a differential amplifier with three AD620 instrumentation amplifiers but did not use a resistor to set the gain of each one? Why didn't you use a single AD620A instrumentation amplifier instead?
I have to just make it for my class work , whatever i.e; poor result or something it has....The LM124 is selected for better spec's. The LM124A is selected for the very best spec's. But it is not a good quad opamp because it is very old and it is made for low supply current.
An LM324 has very poor spec's.
Where can you buy resistors that are matched to 0.02% like the ones inside an AD620A instrumentation amplifier?
Where can you buy an LM324 that has its opamps matched as well as the opamps in an AD620A?
Why did you make a differential amplifier with three AD620 instrumentation amplifiers but did not use a resistor to set the gain of each one? Why didn't you use a single AD620A instrumentation amplifier instead?